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Add comprehensive enhancements and professional tooling
This commit adds extensive improvements to make the repository production-ready with professional development workflows and tooling. ## Configuration & Environment Management - Add environment-specific configurations (dev, test, prod, runtime) - Configurable storage file paths and auto-save settings - Environment-aware logging levels ## Logging & Observability - Integrate Logger throughout the application - Add debug logging for storage operations - Configure log levels per environment - Track user actions and system events ## Developer Experience - Helper scripts (setup.sh, test.sh, clean.sh, docker-build.sh) - Automated setup and testing workflows - Code quality checking script - Build artifact cleanup automation - All scripts are executable and well-documented ## Docker Support - Multi-stage Dockerfile for optimized builds - Docker Compose configuration - Non-root user for security - Volume mounting for data persistence - .dockerignore for efficient builds ## GitHub Templates & Automation - Issue templates (bug report, feature request, documentation) - Pull request template with checklist - Dependabot configuration for dependency updates - Issue template configuration ## Documentation & Governance - CHANGELOG.md following Keep a Changelog format - CODE_OF_CONDUCT.md (Contributor Covenant) - SECURITY.md with vulnerability reporting process - Enhanced README with badges and examples section - Documented all new features and workflows ## Examples & Learning - api_usage.exs - Programmatic API usage example - automated_chat.exs - Multi-user chat simulation - Both examples fully documented and executable ## Testing - Integration test suite (integration_test.exs) - Full workflow testing (registration, login, messaging) - Persistence testing across restarts - Error handling and validation tests - Multi-user scenario testing ## README Enhancements - Add CI, Elixir, OTP, License, and PRs Welcome badges - Document Docker usage - Add quick setup instructions - Reference helper scripts throughout - Expand learning resources section - Update project structure documentation ## Security - Document security policy and reporting process - List known limitations for educational context - Provide security best practices - Outline security enhancement roadmap All enhancements maintain backward compatibility while adding professional-grade tooling and documentation.
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‎.dockerignore‎

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# Build artifacts
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/_build
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/cover
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/deps
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/doc
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*.ez
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*.beam
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# Chat data
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.chat_data*.etf
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# Git
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.git
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.gitignore
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# IDE
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.vscode
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.idea
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.elixir_ls
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# Documentation
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*.md
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!README.md
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# CI/CD
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.github
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# OS
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.DS_Store
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Thumbs.db
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# Tests
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/test
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# Development
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.formatter.exs
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.credo.exs

‎.github/ISSUE_TEMPLATE/bug_report.md‎

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---
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name: Bug Report
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about: Create a report to help us improve
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title: '[BUG] '
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labels: bug
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assignees: ''
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---
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## Bug Description
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A clear and concise description of what the bug is.
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## To Reproduce
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Steps to reproduce the behavior:
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1. Run command '...'
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2. Enter input '...'
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3. See error
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## Expected Behavior
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A clear and concise description of what you expected to happen.
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## Actual Behavior
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What actually happened.
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## Environment
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- OS: [e.g. Ubuntu 22.04, macOS 13.0]
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- Elixir version: [e.g. 1.15.0]
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- Erlang/OTP version: [e.g. 26.0]
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- Chat Simulator version: [e.g. 0.1.0]
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## Error Messages
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```
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Paste any error messages or logs here
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```
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## Additional Context
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Add any other context about the problem here.
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## Possible Solution
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If you have suggestions on how to fix the bug, please describe them here.

‎.github/ISSUE_TEMPLATE/config.yml‎

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blank_issues_enabled: true
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contact_links:
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- name: Question or Discussion
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url: https://github.com/codeforgood-org/elixir-chat-sim/discussions
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about: Ask questions or discuss ideas with the community

‎.github/ISSUE_TEMPLATE/documentation.md‎

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---
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name: Documentation
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about: Report missing, unclear, or incorrect documentation
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title: '[DOCS] '
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labels: documentation
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assignees: ''
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---
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## Documentation Issue
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Describe what documentation is missing, unclear, or incorrect.
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## Location
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Where did you encounter this issue?
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- [ ] README.md
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- [ ] Module documentation
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- [ ] Function documentation
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- [ ] CONTRIBUTING.md
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- [ ] Code comments
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- [ ] Other: [specify]
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## Current State
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What is currently written (if applicable)?
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## Suggested Improvement
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What should the documentation say instead? How could it be clearer?
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## Additional Context
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Add any other context, examples, or screenshots about the documentation issue.

‎.github/ISSUE_TEMPLATE/feature_request.md‎

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---
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name: Feature Request
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about: Suggest an idea for this project
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title: '[FEATURE] '
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labels: enhancement
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assignees: ''
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---
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## Feature Description
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A clear and concise description of the feature you'd like to see.
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## Problem Statement
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Describe the problem this feature would solve. Ex. I'm always frustrated when [...]
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## Proposed Solution
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Describe the solution you'd like to see implemented.
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## Alternatives Considered
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Describe any alternative solutions or features you've considered.
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## Use Cases
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Describe specific use cases for this feature:
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1. As a [user type], I want to [action] so that [benefit]
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2. ...
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## Implementation Ideas
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If you have ideas about how this could be implemented, share them here.
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## Additional Context
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Add any other context, screenshots, or examples about the feature request here.
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## Acceptance Criteria
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What would make this feature complete?
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- [ ] Criterion 1
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- [ ] Criterion 2
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- [ ] Documentation updated
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- [ ] Tests added

‎.github/PULL_REQUEST_TEMPLATE.md‎

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# Pull Request
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## Description
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A clear and concise description of what this PR does.
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Fixes #(issue number)
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## Type of Change
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Please delete options that are not relevant.
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- [ ] Bug fix (non-breaking change which fixes an issue)
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- [ ] New feature (non-breaking change which adds functionality)
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- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
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- [ ] Documentation update
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- [ ] Code refactoring
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- [ ] Performance improvement
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- [ ] Test coverage improvement
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- [ ] Dependency update
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## Changes Made
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List the specific changes made in this PR:
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-
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-
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-
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## How Has This Been Tested?
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Describe the tests that you ran to verify your changes:
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- [ ] Unit tests pass (`mix test`)
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- [ ] Code formatted (`mix format`)
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- [ ] Credo checks pass (`mix credo`)
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- [ ] Manual testing performed
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## Testing Details
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Provide details about your test configuration:
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- Elixir version:
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- OTP version:
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- OS:
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## Checklist
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- [ ] My code follows the style guidelines of this project
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- [ ] I have performed a self-review of my own code
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- [ ] I have commented my code, particularly in hard-to-understand areas
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- [ ] I have made corresponding changes to the documentation
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- [ ] My changes generate no new warnings
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- [ ] I have added tests that prove my fix is effective or that my feature works
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- [ ] New and existing unit tests pass locally with my changes
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- [ ] Any dependent changes have been merged and published
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## Screenshots (if applicable)
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Add screenshots to help explain your changes.
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## Additional Notes
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Add any other context about the pull request here.

‎.github/dependabot.yml‎

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version: 2
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updates:
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# Maintain dependencies for Elixir/Mix
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- package-ecosystem: "mix"
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directory: "/"
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schedule:
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interval: "weekly"
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day: "monday"
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time: "09:00"
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open-pull-requests-limit: 5
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reviewers:
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- "codeforgood-org"
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assignees:
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- "codeforgood-org"
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commit-message:
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prefix: "deps"
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include: "scope"
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labels:
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- "dependencies"
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- "elixir"
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# Maintain dependencies for GitHub Actions
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- package-ecosystem: "github-actions"
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directory: "/"
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schedule:
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interval: "weekly"
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day: "monday"
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time: "09:00"
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open-pull-requests-limit: 3
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reviewers:
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- "codeforgood-org"
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assignees:
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- "codeforgood-org"
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commit-message:
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prefix: "ci"
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labels:
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- "dependencies"
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- "github-actions"
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# Maintain dependencies for Docker
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- package-ecosystem: "docker"
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directory: "/"
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schedule:
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interval: "weekly"
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day: "monday"
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time: "09:00"
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open-pull-requests-limit: 3
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commit-message:
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prefix: "docker"
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labels:
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- "dependencies"
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- "docker"

‎CHANGELOG.md‎

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# Changelog
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All notable changes to this project will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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## [Unreleased]
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### Added
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- Complete project reorganization from single file to modular structure
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- Configuration management for different environments (dev, test, prod)
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- Comprehensive logging throughout the application
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- Docker support with multi-stage builds
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- GitHub issue and PR templates
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- Security policy
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- Dependabot configuration
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- Example usage scripts
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- Integration tests
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- Helper development scripts
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## [0.1.0] - 2025-11-13
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### Added
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- Initial Mix project structure with proper organization
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- Modular architecture with 6 core modules:
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- `ChatSimulator.User` - User management and validation
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- `ChatSimulator.Message` - Message handling and formatting
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- `ChatSimulator.Auth` - Authentication and registration
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- `ChatSimulator.Storage` - Agent-based data persistence
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- `ChatSimulator.CLI` - Interactive command-line interface
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- `ChatSimulator` - Main module with convenience functions
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- Password hashing using SHA256 for security
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- User registration with username and password validation
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- Message sending between users
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- Inbox viewing with unread message indicators
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- Conversation history viewing
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- List all registered users
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- Message read/unread tracking
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- File-based data persistence
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- Comprehensive ExUnit test suite
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- Module and function documentation with @doc and @spec
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- Code formatting configuration (.formatter.exs)
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- Credo static analysis configuration
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- GitHub Actions CI/CD workflow
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- Multi-version testing (Elixir 1.14-1.16, OTP 25-26)
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- Escript build support for standalone executable
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- README with installation and usage instructions
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- CONTRIBUTING.md with development guidelines
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- LICENSE (MIT)
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### Security
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- Implemented password hashing instead of plain text storage
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- Added input validation for usernames and passwords
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- Message content length limits
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## [0.0.1] - Initial Release
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### Added
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- Basic single-file chat simulator
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- User registration and login
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- Simple message sending
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- Basic inbox viewing
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- Plain text password storage (insecure)
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[Unreleased]: https://github.com/codeforgood-org/elixir-chat-sim/compare/v0.1.0...HEAD
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[0.1.0]: https://github.com/codeforgood-org/elixir-chat-sim/releases/tag/v0.1.0
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[0.0.1]: https://github.com/codeforgood-org/elixir-chat-sim/releases/tag/v0.0.1

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